Physics Questions

45

The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.

The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.

The maximum amount of water vapor that can be in the air depends on the air temperature.

Long sightedness is a common vision condition in which nearby objects are blurry.

In this situation, the person with this condition of the eye where the curvature of the cornea is flat or the axial length of the eyeball is short. When light enters the eye, it does not focus directly on the retina, but focuses beyond the retina. This causes near images to appear out of focus and blurred.

Long sightedness is also called hyperopia, and sometimes presbyopia.

Natural Gas is a Non Renewable Resource of Energy because that does not renew itself once used, unlike the other choices. 

It is a resource that will not be naturally replenished.

A manometer is used to measure a pressure difference between two points.

Same charges will repel each other and the charges that are different will attract each other.

Graphite is a good conductor of electricity as it contains free electrons to move through the structure of the graphite.